Pump



E. T. LARKIN PUMP Filed Dec. 4, 1922 2 Sheets-Sheet 1 E. T. LARKBN PUMP Fil'edv Dec. 4 1922 Y 2 Sheets-Smet 2 Patented @et 28, ifi' ELWOOD T. LARKIN, OF BUFFALO, NEW YORK, ASSIGNOR. TO CHARLES A. CRIQUI, OF BUFFALO, NEW YORK.

PUMP.

Application led December 4, 1 922. Serial No. 604,684.

To all whom t may concern.'

Be it known that I, ELwooD T. LARKIN, a citizen of the United States, residing at Buffalo, in the county ofErie and State of New York, have invented new and useful Im- 0 ated engine and more this provements in Pumps, of which the following is a specification.

This invention relates Lo means for priming the feed line of a combustible Huid operparticularly a power plant of this character in which gasoline is supplied to a gas engine by a duplex pump of the sylphon type.

en the engine supplied by a pump of character is stopped for a sufficient length of time to cause the supply conduit to become empty or nearly so, or when this occurs due to making repairs or adjustments of the machine, it becomes necessary to again lill the gasoline supply conduit with gasoline before the normal operation of the engine can be resumed.

This invention has the object to provide simple, convenient and eiiicient means whereby the gasoline-supply conduit may be primed or filled with gasoline or liquid fuel by temporarily operating the feed pump manually instead of by power, and to accomplish this without interfering with the power operated mechanism of the pump or involving any radical change in the construction of the pump mechanism.

In the accompanying drawings: Figure 1 is a vertical longitudinal section of a duplex pump equipped with my improvement. Figure 2 is a side elevation thereof, partly in section, the sectional part being taken on line 2 2, Fig. l; Figure 3 is a horizontal section taken on line 3 3, Fig. 1. Figure 4 is a vertical transverse section taken on line 1 4. Fig. 1. Figure 5 is a fragmentary vertical transverse section taken on line 5--5, Fig. 7 Figure 6 is a fragmentary vertical longitudinal section taken on line 6-6, Fig. 5. Figure 7 is a horizontal section taken on line 7-7, Fig. 4.

Similar characters of reference indicate corresponding parts throughout the several views.

The enclosing casing or frame of the pump comprises an upper front chamber 10, a lower front chamber 11 and a rear chamber 12 arranged in rear of said upper and lower chamber and communicating on its lower front part with the rear end of said lower chamber. The top 13 of the upper chamber is preferably removable and detachably connected with the body 14 of this chamber by screws 15 or the like, and between this top and body is arranged a supporting plate 16 which contains two openings 17 arranged side by side lengthwise of the pump. VVithin the upper chamber are arranged two flexible diaphragms 18 each of which is preferably constructed of sheet metal in the form of a cylindrical accordion or bellows and now commonly known on the market as a sylphon diaphragm, which is capable of expanding and contracting lengthwise for the purpose of increasing and decreasing the internal cubical capacity of the diaphragm which action is here utilized to produce the pumping effect. These diaphragme are secured at their upper ends to the underside of the supporting plate 16 so that the upper end of each of these diaphragms surrounds one of the openings 17 while the lower end of each of these diaphragms has secured thereto an operating head 19, the central part'20 of which is dished upwardly into the space within the lower part of the respective diaphragm. Upon reciprocating each of these diaphragms an alternate suction and pressing effect is produced for drawing liquid fuel into the interior of the diaphragm and expelling the same therefrom.

As each diaphragm is distended or elongated, liquid fuel is drawn into the open upper end of the same through an inlet valve mechanism which comprises an inlet check valve 21arranged in a valve chamber and movable toward and from a valve seat 22 arranged between the inlet and outlet sections 24, 25 of an inlet passage, these sections being formed in the top 13 and the outlet section of each of these passages communicating with the open upper end of one of the diaphragms through the respective openings 17 in the supporting plate. Each of these inlet valves is guided toward and from its seat by a stem 26 arranged on the top of the valve and sliding in a vertical guide sleeve 27 which is secured between an upwardly facing shoulder 28 on the adjacent part of the top 13 and a screw plug 29 secured tothe adjacent part of the same, as shown in Fig. 2. The two inlet sections 24 of the inlet valve passages are connected by a conduit 30 and one of these inlet sections is connected by a main supply pipe 31 with the source from which the fuel oil is supplied.

Upon compressing or contracting each diaphragm, the liquid is expelled therefrom through an outlet valve mechanism which comprises an outlet check valve 32 arranged in a valve chamber and movable toward and from a seat 34 arranged between the inlet and outlet sections 35, 36 of an outlet passage, the sections being formed in the top 13 A and each inlet section communicating withthe open upper end of one of the hollow diaphragms, as shown in Figs. 1 and 2. The outlet sections of the two outlet passages are connected by a pipe 37 and one of these sections is connected with a main delivery pipe 38 lea-ding to the tank or other destination intended to receive the liquid.

It vfollows from this construction that when the diaphragms are expanded, the same will draw liquid from the main supply pipe past the inlet valves into the diaphragms and upon contracting lthe same the liquid will be discharged therefrom through the outlet valves to the delivery pipe.

The two. diaphragms arel preferably expanded and contracted alternately so as to secure a substantially continuous flow of liquid, this being preferably accomplished normally by a power mechanism which is constructed as follows:

39, 39 represents two upright springs each bearing at its upper end against the uppermost part of the dished head vof one of the diaphragms'while its lower end rests on the adjacent part ofthe wall 40 between the upper and lower casing chambers. ence of these springs raises the diaphragms and causes the liquid contents thereof to be discharged therefrom through the delivery pipe to the place of consumption.

41, 41 represent two upright plungers .or pump rods each of which is secured at its upper end to the uppermost part of the dished head of one of the diaphragms and guided with its central part in a bushing 42 in the wall 40 while its lower end is pro- 43 which is guided in a the bottom of the lower vided with a collar vertical socket 23 in chamber.

44 represents a horizontal operating shaft j'ournaled longitudinally in bearings 45 in the lower rear part of the rear chamber and provided at its. opposite ends with cranks, eccentrics or cams 46, 47, the centers of 'which are arranged in diametrically opposite sides of the axis of the operating shaft. The latter may be turned in any suitable manner from an available source, for instance, by an intermediate shaft 48 journaled transversely in a bearing 49 on the engine frame 50 and provided within` the rear chamber with a worm 51 which meshes with a worm wheel 52 on the central part of the operating shaft, and a longitudinal driving 'shaft 53 The resiliwhich receives its power from the engine of which the pump forms a part and is con nected by a pair of spiral gears 54 with the intermediate shaft, as shown in Fig. 4.

Extending lengthwise of the lower chamber is a shaft 55 which for other purposes, as will presently appear, is journaled in bearings 56, 57 on the end walls of this chamber, so as to rock therein. Upon the shaft are loosely mounted two rock levers each of which has a rear arm 58 engaging with one of the cams or eccentrics 46, 47 and has its front arm 59 provided with a fork 60 which straddles the collar 43 on the adjacent plunger and bears downwardly against upwardly facing shoulders 61 thereon.

Upon turning the operating shaft, the rock levers are turned alternately in opposite directions, so that the plungers are actuated lfor alternately depressing the diaphragm heads and causing liquid to be drawn into the diaphragms preparatory to delivering the same to the discharge pipe by the action of the diaphragm springs.

Vhen the pump becomes empty and the diaphragms, together' with the conduits connected therewith, require refilling or priming before they can be operated by the power of the engine of which they form a part, means are provided for actuating the pump by hand until the piping is filled with fuel oil. The preferred means for this purpose shown in the drawings are constructed as follows:

62 represents a handle 0r hand lever which is secured to the rock shaft 55 on the eXterior of the pumpl casing. Between the two pump rock levers is arranged anl oscillating yoke which comprises two priming roc arms 63 secured to the rock shaft 55, and a longitudinal shifting bar 64 connecting the rock arms and having its ends extending laterally beyond the outer sides of the rock arms. On the inner sides of the front arms of the pump operating levers, the same are provided with laterally projecting lugs or shoulders 65 which are arranged below the ends of the shifting bar 64. Y

During the normal operation of the pump by power, the rock shaft 55 is turned by the handle 62, so that the ends of the shifting bar on the lrock arms are elevated above the shoulders 65 of the rock levers and permit the latter to oscillate freely without being influenced by the shifting yoke. The latter is held in this position by fastening the hand lever 62 in an elevated position to a lug 66 on the exterior of the pump casing by a bolt 67.

If the pump requires priming, the handle 62 is disconnected from the casing and oscillated by hand. During each depression of the handle, the yoke descends and engages the ends of the shifting bar with the shoulders 65 of the rock levers, so that the latter are depressed simultaneously together with the plungers or pump rods and diaphragms and charges of liquid are drawn into the diapliragms at the same time. Upon releasing the downward pressure on the handle, the diaphragms are raised by their springs together with the rock levers and yoke, thus discharging the charge of liquid from the diaphragms. This operation is repeated for each oscillation ofthe handle and associated parts untilvthe conduit leading to the carburetor or other part intended to receive the fuel oil, has been filled and the engine is capable of running and replenishing the fuel oil supply by power, after which the manual pump operating mechanism is again moved into and fastened in the position in which the same does not interfere with the normal operation of the pump mechanism.

By means of this device, a power pump when dry can be quickly primed manually with fuel oil so as to enable the engine supplied with fuel by the'pump to be operated Without undue interruption.

I claim as my invention: 4

1. A pump comprising a liquid shifting member, a pump rod connected with said shifting member, a rock lever operatively connected with said rod, and a manually operated rock arm pivoted concentrically with said lever and adapted to engage an arm of the latter.

2. A pump comprising a liquid shifting member, a pump rod connected with said shifting member, a. rock lever operatively connected with said rod, a rock shaft on which said lever turns loosely, and a rock arm secured to said rock shaft and adapted to engage an arm of said rock lever.

3. A pump comprising a liquid shifting member, a pump rod connected with said shifting member, a rock lever operatively connected with said rod, a rock shaft on which said lever turns loosely, a rock arm secured to said rock shaft and adapted to engage an arm of said rock lever, and a handle secured to said rock'lever.

4. A pump comprising a liquid shifting and contractible diaphragme,

member, a pump rod connected with said shifting member, a rock lever operatively connected with said rod, a-rock shaft on which said lever turns loosely, a rock arm secured to said rock shaft and adapted to engage an arm of said rock lever, a handle secured to said rock lever, `and means for fastening said handle to a stationary part when not in use.

5. A pump comprisingY an expansible and contractible accordion diaphragm for shifting the liquid, a reciprocating rod connected with the diaphragm and provided with a shoulder, a spring operating on said diaphragm to contract the same, a rock lever engaging one of its arms with said shoulder and provided with a laterally pojecting lug, a rotary cam engaging the other arm of said rock leverA and adapted to move the latter in the direction for expanding said diaphragm, a rock shaft upon which said rock lever turns, a rock arm secured to said rock shaft and having a part adapted to engage said lug on the rock lever, and move said rod in the direction for expanding said diaphragm, and means for manually actuating said rock shaft."

6. A pump comprising two expansible reciprocating pump rods connected respectively with said diaphragms and each provided with a shouldered collar, two rock levers each having a forked front arm en aging the shouldered collar of one of said evers, a rotary shaft provided at opposite ends with cams or eccentrics which engage respectively with the rear arms of said levers and operateto move them in the direction for expanding said diaphragme, a manually operated rock shaft upon which said 'rock levers turn loosely, a pair of priming rock arms secured to said rock shaft adjacent to the inner side of said'rock levers, and a shifting bar connecting said priming rock arms and having its opposite ends projecting beyond the same and adapted to engage with the front arms of said rock levers for shifting the same in the direction for expanding said diaphragms.

ELWOOD T. LARKIN. 

